Stenciling machine



March 14, 19 33. w. R. REsPEs STENCILING I MACHINE Filed June 14, 1950 3Sheets-Sheet l Mn Z m m March 14, 1933. w RRESPESS 1,901,473

STENCILING MACHINE Filed June 14, 1930 5 Sheets-Sheet 2 a4 a: 24 7 2a;96

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a! I a: 9 s: ---M F uuuonnuunnuuuuuuuuuuuuu zhwmw i2 @eapw March 14,1933. w. R. RESPESS STENCILING MACHINE Filed June 14, 1930 3Sheets-Sheet 3 1]; vfeiil r Patented Mar. 14, 193.3

- UNITED STATES PATENT OFFICE WILLIAM B. RESPESS, OF GRASSM'EBE, TA'I'ENISLAND, NEW YORK, ASSIGNOB '10 NAZ-DAR COMPANY, OF CHICAGO, ILLINOIS, ACORPORATION OF ILLINOIS ,STENCILING MACHINE Application filed June 14,1930. Serial No. 461,229.

This inventiontrelates to the art of printing and particularly to animproved form of stenciling machine which is adapted to on paper,cardboard, or other material which can be made in sheet form.

In stenciling machines which have here tofore been designed for work ofthis nature, the printing is usually effected by superposing a stencilof silk cloth or other suitable material upon the sheet to be printedand then rubbing a body of paint over the stencil by means of a wiper orsqueegee to force the paint through the porous or penetrable areas ofthe stencil. The squeegee is mounted for reciprocatory movement, itbeing' moved over the stencil 111 one direction to print a sheet and inthe reverse direction to print the next succeeding sheet. Beforereversing the movement of the squeegee .it is raised from the stencil bysuitable mechanism andis then shifted or jumped over the I batch ofpaint. The squeegee is then lowered back onto the stencil'preparatory tomovement in the opposite direction across the stencil.

An important object of my invention is. to provide mechanism forcontrolling the movement of the... squeegee in such a manner as to avoidthe necessity of lifting it over the batch of paint to eifect'theprinting of successive sheets. The mechanism is designed to move thesqueegee in anendless path so that it always moves across the stencilsheet in the same direction during the printing operation. Byeliminating this shifting or jumping of t e squeegee over the batch ofpaint, I am able to obtain a greatly improved qualit of work. 1

Another object o the invention is to provide a stenciling machine of thecharacter set forth which is adapted for automatic operation as topermit continuous printing of the sheets as they: are fed under theprinting unit.

Further objects and advantages of the invention will be apparent as Iproceed with m specification, which, taken in connection with theaccompanying drawings, discloses a preferredembodiment thereof.

stenciling machine; the printing of designs 1n one or more colorsReferring to the drawings:

Fig. 1 is a side elevational view of .the

Fig. 2 is a top plan view of the same; Fig. 3 is a broken plan view ofthe bed plate with the printing frame removed therefrom;

Fig. 4 is a vertical longitudinal section through the printing frame andbed plate, taken on the line 44 of Fig. 2;

Fig. 5 is a broken transverse section through the printing frame and bedplate taken on the line 5-5 of Fig. 1;

Fig. 6 is a detail view illustrating the offset chain drive and sprocketwheel mechanism; and

Fig. 7 is a detail section through the squee ee.

Re erring larly to Figs. 1 and 2, the machine comprises to the drawings,and particu-' the numeral 10; sheet feeding mechanism 11 supported onthe frame 10; and a printing unit 12 for stenciling 'designsin one ormore colors as the sheets 13 of cardboard or other suitable material arefed thereto by the feeding' mechanism 11.

- The supporting frame 10 consists of four vertical post members 14,which are tied together near their lower ends by 'crossbars 15, and ahorizontal bed plate supporting unit consisting-of a pair of beams 16which are supported on the upper ends of the posts 14. A series of tiebars 17 extending between the posts 14 and the bars 16 afford additionalsupport forthe projecting ends of the bars 16, and stiffening rods 18are provided to connect the center portions of the bars 17 with theupper ends of the posts 14. It will be understood that these framemembersare connected together by suitable bolts of rivets to form arigid frame unit.

The sheet feeding mechanism 11 consists of a bed plate 19 which rests onthe longitudinal bars 1b; and an endless feed belt 21 which takes overrollers or drums 22 and 23 carried on spindles which are j ournaled inthe ends of the longitudinal frame members ,16. The bed plate 19 may beconsidered as consisting of three sections, the first section dischargesection from which the sheets are delivered to suitable drying trays.The feed belt 21 is driven from a motor 27 which is suitably supportedon the crossbars of the supporting frame 10. A main drive shaft 28,journaled at its opposite ends-in a pair of uprights 29, is driven fromthe motor 27 through a sprocket wheel 30 and. a chain 31 which takesover the wheel 30 and a second sprocket wheel 32 carried by the armatureshaft of the motor 27. Power is taken from the drive shaft 28 to theconvey-' or belt roller 22 through an ofiset drive chain 33 which takesover a pair of sprocket wheels 34 and 35 on the shaft 28 and acorresponding pair of sprocket wheels 36 and 37 on the projecting end ofa spindle 38 carrying the roller 22. The sprockets 34 and 35 are bothdrive sprockets and are keyed to the shaft 28. The sprocket 36 is adrive sprocket and is keyed to the spindle 38. The sprocket 37, however,is an idler sprocket which engages the offset run of the chain 33 totemporarily stop movement of the conveyor belt 21 during the printingoperation.

The offset chain arrangement for obtaining intermittent driving motion,such as that just described inconnection with the feed belt roller 22,is illustrated in Fig. 6. The

chain 33 is made up of alternately offset por tions 39 and 41, theportions 41 engaging the drive sprockets 34 and 36, and the portion 39engaging the drive sprocket 35 andthe idler sprocket 37. During theinterval in which the offset portion 39 is taking over the idlersprocket 37, the feed belt roller 22 remains stationary. As willpresently appear, it is during this period that the printing of thesheet occurs.

Referring to Figs. 1, 4 and 5, the printing unit 12 which is disposedover the central section 25 of the bed plate 19 comprises a printingframe 42, a squeegee 43 which is movably supported in the frame 42; astencil 44 disposed in the frame 42 below the squeegee'43; and a paintsupply unit 45 for feeding paint onto the stencil 44.

The printing frame 42 consists of three main parts, namely, an upperpart 46 which may be termed a squeegee box, a lower base portion 47which, as will presently appear,

restson movable supports carried by the frame members 16, and a stencilframe 48 which is interposed between the squeegee box 46 and the base.portion 47 The squeegee box 46 is rectangular in shape and consists ofside walls 49 and end walls 51- which are bound together at their uppermar "nal edges by angle bars 52 to forma rigi ,boxunit. .A pair of anglebar irons 53 extend longitudinally along the 'side walls 49, the loweredges of these bars resting on the base portion 47 to afford a supportfor "the squeegee box. In the embodiment shown which is' ordinarily asheet of finely woven silk cloth,-is tacked along its edges to arectangular wooden frame 58 which is connected by bolts or othersuitable means to the stencil frame 48. ,The division of the printingframe 42 into these three separate units provides means for easy removaland replacement of the stencil frame 48 carrying the stencil 44. Thesqueegee box 51 merely has to be lifted upwardly to be removed,whereupon the stencil'frame, 48 may be lifted from'the base portion 47..This feature is a highly practical one inasmuch as the stencils have tobe frequently removed for cleaning other designs. I

Referring particularly to Figs. 4, 5 and 7, the squeegee 43 is suspendedin the printing frame 42 between a pair of endless carrier chains 59which takeover corresponding pairs of sprocket wheels 61 carried byshafts 62 which are journaled at their op-- posite ends in the sidewalls 49 of the squeegee box. The squeegee 43 consists of a wood ormetal bar 63 which is provided at its 0pposite ends with attachingbrackets 64 (Fig. 5) to afford connection with the chains 59. The lowerfront face of the bar 63 is provided with a rubber squeegee element 65whichis adjustably attached to the bar 63 as by a screw 66 extendingthrough an adjusting slot 67 in the squeegee element 65;. The pressureof the squeegee element- 65 on the stencil 44 can be varied by looseningthe screw 66 and shifting the element 65 relative to the bar 63. Thefront face of the bar 63 is provided with a metal guard plate 68 orreplacement by stencils of to. form a rigid frame unit. The stencil 44,

which extends across the entire width of the squeegee. The opposite endsof the bar 63 are bent inwardly as indicated at 70 to close the ends ofthe trough formed by said bar and the squeegee element 65. A rubberstrip 69 is attached to the lower front edge of the guard plate 68. Theend walls 51 of the squeegee box are provided with curved aprons 71 and72 for preventing the escape of paint from the. squeegee when it israised from the stencil 44. The side walls 49 of the squeegee box areprovided betweenv the sprocket wheel 61 with angle bars, 73'.('Fig.

- which support the upper and lower runs of the chains 59.

Referring to Figs. 1 and 4, the paint supply'unit 45 in the embodimentshown consists of a supply tank 74 which is supported by a pipe 75carried by the squeegee box 46. A supporting block 76 carried by the endwall 51 of the squeegee box supports the lower .end of the'pipe 75. Theblock 76 is 7 10 provided with a duct 77 communicating with The path ofmovement of the squeegee 43 will be apparent from Fi 4. As the carrierchains 59 move in a c ockwise direction over the sprockets 61 thesqueegee 43 moves a batch of paint 79 across the stencil 44 in thedirection from right to left. As the paint moves over the stencil it isforced through the penetrable areas to form the design on the cardboardsheet 13 which rests on the bed plate 19 with its up r surface incontact with the stencil 44. Af zr the squeegee has completed itsmovement across the cardboard sheet. it carries the batch of paint 79upwardly against the apron 71 and as it proceeds across the to run ofthe chain any unused paint is'carrie in the trough-shaped containerformed by a the guard plate 68 and the rubber squeegee 40 element 65. Asthe squeegee aproaches the end of the top run it is again turneddownwardly and carries with it the unused portion of the batch of paint79 and any addi tional paint which is supplied from the tank 74. Thestrip 69 and the apron 72 prevent the esca e of the paint'as thesqueegee approaches t is downturned position preparator tomovementacross the next sheet of card ard.

The printing frame 42 is mounted for vertical reciprocatory. movementonthe bed plate 19 so as to permitthe feeding in of the fresh sheets andthe'withdrawal of the printed sheets, thus providing for continuousprinting. The mechanism for raising and lowering the printing frame 42consists of a pair of cam shafts 81 and 82, journaled at their oppositeends in the longitudinal frame members 16, and provided, respective 60ly, with pairs of cam discs 83 and 84 for engaging against the lowerfaces of the U- shaped channel bars 55 forming the base portion of theprinting frame 42. The ro- Jecting end of the cam shaft 81 is provided35 with a pair of sprocket wheels 85 and 86,

1 back into printing and the cam shaft 82 is similarly provided with apair of corresponding sprocket wheels 87 and 88. Intermittent turning ofthe cam shafts 81 and 82 is accomplished by the use of an ofiset chain89.consistin of alternate ofi'set portions 91 and 92. he sprockets 86and 88 are idler sprockets so that when the offset portions'91 are inengagement therewith no turning of the cam shafts 81' and 82 isproduced. The sprockets 85 and 87 are keyed to the corresponding camshafts 81 and 82 to effect turning thereof when the offset chainportions 92 are in engagement wlth these sprocket wheels. It will beapparent that as the cam discs 83 and 84 are turned they will, throughcam action against the bars- 55, raise 'and lower the printing frame 42to permit the introduction and removal of the sheet stock from, themiddle section 25 of the bed plate 19. As the printing frame 42. israised the stencil 44 is lifted from the printed sheet and, as

will presently appear, the timing of the conveyor belt 21 is such as toremove the printed sheet and introduce a fresh sheet under the printingframe before the same is lowered printing operation. he cam discs 83 areos'ition for the next given asli ht lead over the cam discs 84 so as toli the printin frame 42 by a tilting movement. This ti tlng movement isrepeated in reverse manner when the printingframe is lowered to replacethe stencil on the cardboard sheet. -The object of this tilting movementis to separate the stencil from the cardboard sheet in a,p'rogressivemanner approximating a peeling action rather than by a sudden removalover the entire area of the sheet. The chain 89 takes over a smallsprocket wheel 93 which is carried on a stub shaft journaled intheupright 29. The sprocket 93 isdriven from the main drive shaft 28through reduction gears 94 and 95. The sprocket 93 is really a doublesprocket so as to engage either of the offset portions 91 and 92 of thechain 89.

Referring to Figs. 3'5, the central section 25 of the bed plate 19 isprovided with dowel pins 96 for keeping the printing frame-'42 inaligned position on the bed plate. These pins extend through alignedapertures in the channel bars 55 .and t e stencil frame 48.

These, openings are sufliciently' large so that n the tilting movementgiven to the frame by v 120 98 in the feed belt 21 and aligned apertures99 in the bed plate 19. The aligned fingers 97 which are carried by theplates 53 and 54 of the printing frame may be provided-with adjustingscrews as indicated at 101 to take care of any variation in width of thesheet stock. The channel bars .55 are provided rier belt21 while thestencil is being lifted off. After the frame has been raised enough tostraighten out these fingers they are, in turn, lifted from the sheetwhich may then be withdrawn by the belt 21.

Referring to Figs. 1, 3 and 5, the squeegee carrier chains 59 are drivenby a sprocket wheel 103 carried by a stub shaft jou'rnaled in the sidewall 54 of the squeegee box. The

upper teeth of this sprocket mesh with asprocket chain 104 which takesover a pair of sprocket wheels 105 carried by the projecting ends of theshafts 62. The lower teeth of the sprocket 103 mesh with a sprocket.chain 106 which takes over a pair of idler sprockets 107 and 108carried by the cam shafts 81 and 82, respectively. The chain 106 alsotakes over a sprocket wheel 109 which is secured to the main drive shaft28.

When the printing frame 42 is lowered into printing position thesprocket wheel 103 en gages the drive chain 106 and is turned to movethe squeegee in an endless path described by the carrier chains 59.

The timing of the various parts of the mechanism is obtained inaccordance with the ratio of the various sprocket driyie Wheels and bythe relative lengths of the'ofi'set portions of the drive chains 33 and89. These relative adjustment-s must be such that the raising andlowering of the printing frame sit 42 will .occur in timed sequence withthe movement of the feed belt 21. The timing must also be adjusted sothat the squeegee Will be given a full movement from one edge of thestencil to the other while the printing frame is in the printingposition. In the embodiment shown in the drawings the size of thesprocket drive wheel 36 which controls the movement of the conveyor belt21'is such that about three revolutions are required to move a cardboardsheet 13 across the printing section 25 of the bed plate 19. Therefore,the length of' the offset portion 41 of the chain 33 will, be-equal toabout threetimes the circumference of the sprocket wheel 36. In the caseof the drive chain 89', which con-' trols the movement of the cam discs83 and 84, the offsets in the. chain will be equal in 'length to thecircumference of "the sprocket wheels 85 and 87 inasmuch as the printingframe is raised and lowered once for each revolution of the cam shafts81 and 82. Moreover since the cam'discs 83 and 84 are" Iturned!simultaneously the positioning of the offsets in the chain 89must be such that 'both of the drive sprockets 85 and 87 are of theprinted sheet and introduction of a fresh sheet by the conveyor belt 21.It is further to be noted that with the system of driving mechanismshown the squeegee 43 will have to make a complete revolu.- tion whilethe printing frame is lowered into printing position inasmuch as in theraised position of the printing frame the squeegee remains stationary.The necessar speed for this movement is obtained, by a justing the sizeof the sprocket wheel 109 which engages the chain 106. Since thesprocket wheels 107 and 108 are mounted for free rotation on the camshafts 81 and 82 the movement of the chain106 does notinterfere with themovement 'of the cam drive chain 89.

It is believed that a brief outline of. the several steps occurring inthe operation of the machine will aid to a clearer understanding of theinvention. Assuming that the' printing of a sheet has just beencompleted, at which point theisqueegee 43 will be in the upturnedpositio n on the top run of the carrier chains 59, the offset portions92 of the cam drive chain 89 move into engage ment with the sprockets 85and 87 to turn the cam discs 83 and 84. Turning of these cam discsraises the printing frame 42 to remove the stencil 44 from the printedsheet 13. lmmediatelyupon the removal of the stencil from the printedsheet, the offsetportion 41 of the'carrier belt drive chain 33 'en gagesthe sprocket 36 to start movement of the feed belt 21. While theprinting frame is in the raised position the printed sheet. is moved bythe belt 21 from the middle section 25 of the bed plate 19 to thedischarge section 26 of the bed plate. A fresh sheet is fed from thefeed section 24to the printing section 25 simultaneously with thewithdrawal of the printed sheet. By the time the fresh sheetispositioned below the printing frame the, fi'set section 39 of the chain33 has mov' into engagement with the idlersprocket 37 to step movementof the feed belt 21. Immediately upon the bringing of the fresh sheettoa position of rest, the

discs 83 and 84 to bring the stencil .44 into engagement with the'upperface of the sheet ,13. As soon as the printing frame is in the loweredposition; the offset portions 91 of the cam drive chain 89rmove ntoengageinent with the idler sprockets 86' and 88 be understood therefrom,

to stop turning of the cam discs 83 and 84. The lowering .of theprinting frame 42 brings the carrier chain drive sprocket 103* intoengagement with the chain 106 which moves continuously. During the timethe feed belt drive chain 33 and the cam'drive chain 89 are inactive thesqueegee 43 is car- Y ried through one complete run of the carrierchains 59, movement across the lower run of these chains serving toforce the paint through the stencil onto the sheet 13.

After the passage of the squeegee across the stencil the cycle ofoperations is repfated, the printing'frame 42 being raised y the camdiscs 83 and 84 and the feedbelt 21 being again rendered active towithdraw the printed sheet and introduce afresh sheet under the printingframe. I The foregoing detailed description has been given for'clearnessof understanding only, and no unnecessary limitations should but theappended claims should be construed as broadly as permissible in view ofthe prior art.

\Vhat I regard as new and desire to secure by Letters Patent is: v 1. Astenciling machine for printing sheet stock and the like comprising, abed plate, a stencil, a stencil supporting frame mounted for freevertical movement relative to said bed plate, a squeegee, including awiping element formoving a batch of paint over the stencil, and meansfor advancing the squeegee across the face of the stencil when saidframe is in the lowered position on the bed plate, said means beingoperable to return the squeegee from the forwardedgeof the stencil alongan endless path back into printing position at the rear edge of thestencihpreparatory to the printing of the next succeeding sheet.

2. A stenciling machine for printing sheet 1 stock and the likecomprising, a bed plate,

' plate, a squeegee,

a stencil, a stencil supporting frame disposed over said bed plate,means for feeding sheet stock into printing position on the bed plateand for removing the printed sheet therefrom, means operating in timedsequence with the feed means for raising and lowering said framerelative ,to the bed including a wipingwlement for moving a batch ofpaint over the stencil, and means for advancing the squee- 'ee acrossthe face of/the stencil when said frame is in the loweredposition on thebed; plate, said means being operable to return the squeegee from theforward edge of the stencil alongan endless path back into printingposition at the rear edge of the stencil preparatory to the printing ofthe next succeeding sheet. 7

3. A stenciling machine for printing sheet stock and the like comprisinga bed plate a stencil, a stencil supporting frame mounted forfreevertical movement relative to able to said bed plate, a squeegee,including a wiping element or moving a batch of paint over the stencil,and means comprising an endless chain conve or for advancing thesqueegee across-the ce of the stencil when the frame is in the loweredposition on the bed plate. i

a; A stenciling machine for printin sheet stock and the like comprisinga be plate a stencil, a stencil supporting frame mounted for freevertical movement relative to said bed late, a squeegee, including awiping element or moving a batch of paint over the stencil, and anendless chain conve orof the stencil when said rame is in thelowered'position on the bed plate, said conveyor bein operable to returnthe squeegee from the orward edge of the stencil along an endless. pathback into printing position at the rear edge of the stencil preparatoryto the printing of the next succeeding sheet.

5; In a stenciling'machine, for printing sheet stock and the like, a bedplate, a stenoil, a stencil carrying frame movably supported on said bedplate, cam mechanism for raising and lowering said frame-relative tothe'bed plate, a squeegee, including a wiping element for moving a batchof-paint over the stencil, and means for advancing the squee ee acrossthe face of the stencil when said rame is in the lowered position on thebed plate, said means bein operable to next succeeding sheet.

6. A. stencilinggmachine for printing sheet stock and the h ecomprising, a bed plate, a stencil, a stencil supporting frame mountedfor free vertical movement relative to said bed plate, a squeegee,including a wiping element for movin the stencil, means %or supplying acoloring medium to the stencil,,and means for advancing the squeegeeacross the face of the stencil when said frame is in the loweredposition on the bed plate, said means being operable to return thesueegee from the forward edge of the stenci along an endless path backinto printing position at the rear a batch of paint over edge of tliestencil preparatory to the printin of the next succee ing sheet.

. In a stenciling machine, a bed-plate, a stencil, a stencil supportingframe, means for feeding sheet stock into printing position on the bedplate and for removing the printed sheet therefrom, means operating intimed sequence with the feed means for raising said frame to remove thestencil from theprinted sheet, said means being operlower. the frame tobring the stencil into printing position on the next succeeding sheet,and color applying means zgincluding e v emma a squeegee and means formoving the squeegee across the stencil when said, frame is in printingposition on the bed plate, said lastmentioned means being operative toreturn the squeegee along an endless path into position or printing thesucceeding sheet.

8. In a stenciling machine, a bed plate,

a stencil, a'stencil supporting frame, means for feeding sheet stockinto the printing position on the bed plate and for removing the printedsheets therefrom, means operating in timed sequence with the feed meansfor raising said frame to remove the stencil from the printed sheet,said means being operable to lower the frame to bring the stencil intoprintingposition on the next succeeding sheet, flexible finger membersfor holding down the printed sheet during the interval of removal of thestencil therefrom, and color applying means including a squeegee andmeans for moving the squeegee across the stencil when said frame is inprinting position on the bed plate.

9. In a 'stenciling machine, a bed plate, a stencil, a stencilsupporting frame; means for feeding sheet stock into-printing positionon the bed plate and for removing the printedsheets therefrom, meansoperating in timed sequence with the feed means for raising said frameto remove the stencil from the printed sheet, said means being operableto lower the frame to bring the stencil into printing position on thenext succeeding sheet, aligning means for positioning the sheet on thebed plate preparatory to the lowering of the stencil support-. ing framethereon, and color applying means including a squeegee and means "formoving the squeegee across the stencil when said rame is in printingposition on the bed plate, said last-mentioned means being operative toreturn the squeegee along an endless path into position for printing thesucceeding sheet.

10. A stenciling machine for printing sheet, stock and the likecomprising, a bed plate, a stencil, a stencil supporting frame, asqueegee,including a wiplng element for moving a batch of paint over thestencil, and means for advancing the squeegee across the face of thestencil when said frame is in printing position on the bed plate, saidmeans being operable to return the squeegee from the forward edge of thestencil along an endless path back into printing position at the rearedge of the stencil preparatory to the printing of the next succeedingsheet.

11. In a stenciling machine for printing sheet stock and the like, aprinting frame, a stencil supported in said frame, and color applyingmeans comprising an endlessconveyor movably supported in the printingframe and a squeegee extending transversely of the frame providedwith awiping element for moving a batch of paint over the stencil, saidsqueegee being movable with said convepor over the face of the stencilwhen the rame is in the sheet stock.

'12. In a stenciling machine for printing sheet stock and the like, aprinting frame, a

printing position on stencil supported in said frame, and color applyingmeans comprising an endless conveyor movably supported in the printingframe and a squeegee extending transversely of the frame and movablewith said conveyor over the face of the stencil when the frame is inprinting position on the sheet stock, said squeegee including a rubberwiping element and a guard member co-operating with said element to forma trough for retaining the coloring -medium turned position of thesqueegee.

13. A stenciling machine comprising, a bed plate, a printing framedisposed over in the upsaid had plate, a stencil supported in saidframe,means for raising and lowering the printing frame relative to the bedplate, a squeegee movably supported in said frame and provided with awiping element for moving a .batch of paint over the stencil, andcarrier'means for moving the squeegee along an endless path in theprinting frame, said carrier means operating to advance the squeegeeacross the face of the stencil when the frame is in the lowered positionon the bed plate.

it. A stenciling machine comprising, a bed plate, a printing framedisposed over said bed plate, a stencil supported in said frame, meansfor raising and lowering the printing frame relative to the bed plate, aI

squeegee movably supported in said frame and provided with a wipingelement for moving a batch of paint over the stencil, and an endlesschain conveyor for advancing the squeegee across the face of the stencilwhen the frame is in the lowered position on the bed plate.

15. In a stenciling machine for printing sheet stock and the like, a bedplate, a print I ing frame movable relative to said bed plate,

printing position on the bed plate and for v removing the printed sheetstherefrom, means for periodically raising the printing frame to removethe stencil from the printed sheet, said means being operable to lowerthe frame to bring the stencil into printing position on thenextsucceeding sheet, a squeegee movably supported in said frame andprovided with a wiping element for moving a batch of paint over thestencil, and carrier 1 the printed sheet therefrom, means operating intimed sequence with the feed means for raising the printing frame toremove the stencil from the printed sheet, said means being operable tolower the frame to bring the stencil into printing position on the nextsucceeding sheet, a squeegee movably supported in said frame, andcarrier means for moving the squeegee along an endless path in theprinting frame, said carrier means operating to advance the-squeegeeacross the face of the stencil when the frame is in the lowered positionon the bed plate.

18. In a stenciling machine, a bed plate, a printing frame movablerelative to said bed plate, a stencil carried in said frame, and colorapplying means comprising an endless conveyor movably supported in theprinting 'on the bed plate, said in timed sequence with said feed meansfor raising the printin frame to remove the stencil from the printedsheet, said mechanism including means for tilting the frame toprogressively separate the stencil from the printed sheet, flexiblefinger members for holding down the printed sheet durin the interval ofremoval of thestencil therefrom, aligning means for positioning thesheet on the bed plate preparatory to the lowering of the printing framethereon, means for supplying a coloring medium to the stencil, and colorapplying means comprising an endless chain conveyor removably supportedin the printing frame and a squeegee extending transversely of the frameand movable with i said conveyor over the face of the stencil when theframe is in the lowered position squeegee including a rubber wipingelement and guard member co-operating with said wiping element to form atrough for retaining the coloring medium in the upturned position of thesqueegee. a

In witness whereof, I hereunto subscribe my name to this specification.

WILLIAM 3a. .nEsrEss.

frame and a squeegee supported on said con- I veyor and provided with awiping element for moving a batch of paint over the face of the stencilwhen said frame is in printing position on the bed plate.

19. In a stenciling machine, a bed plate, a printing frame movablerelative to said bed plate, a stencil carried in said and color applyingmeans comprising an endless chain conveyor movably supported in theprinting frame and a squeegee extending transversely of the frame andmovable with 45 said conveyor over the face of the stencil when theframe is in printing position on the bed plate, said. squeegee includinga rubber wiping element and a guard member cooperating with said Wipingelement to form 9 a trough for retaining the coloring medium in theupturned position of the squeegee;

20. A stenciling machine for printing sheet stock and the likecomprising, a bed plate including a feed section,

55 section, and a printing section intermediate the feed and dischargesections, a printing frame positioned over the printing section of saidbed plate, a stencil removably supported in said printing frame, meansincluding a conveyor belt or feeding the sheet stock from thefeedsection of the bed plate into printing position below the printingframe, said means being further operable to remove the printed stockfrom the printing section 65 of the bed plate,

frame,

a discharge cam mechanism operating

